Explain the raster scan monitors, Computer Engineering

Assignment Help:

Explain the raster scan monitors

The refresh process must also be performed for raster scan monitors. Most television monitors are raster scan display devices : one scan-line at a time. Raster scan systems uses a memory buffer called frame buffer (or refresh buffer) in which the intensities of the pixels are stored. Refreshing the screen is performed using the information (intensity of each pixel) stored in the frame buffer. Frame buffer can be treated as a two-dimensional array. Raster display devices read the frame buffer and activate the three phosphor dots in the triad according to the value read from the frame buffer.

The entire contents of the frame buffer should be read and the pixels should be activated appropriately at a sufficiently high rate to avoid flickering of the picture. Depending on the persistence of the phosphor coated inside the screen, the monitors require different refresh rates. In some raster display devices, a frame buffer is displayed in two passes. This kind of refreshing is called interlaced. In the first pass the odd rows are refreshed, while the even rows are refreshed in the second pass. Thus, the screen is refreshed in half the time. Though this approach does not really increase the rate of refreshing the screen, but is quite effective in reducing the flicker.

 


Related Discussions:- Explain the raster scan monitors

Resource management techniques, a company has 4 machines to do 3 jobs.each ...

a company has 4 machines to do 3 jobs.each job can be assigned to one and only machine.determine the job assignments which will minimize the total cost

Determine signed binary number, -8 is equal to which signed binary number ?...

-8 is equal to which signed binary number ? Ans. 10001000 is the signed binary number that equal to - 8.   To show negative numbers in the binary system, Digit 1 is utilized fo

Explain optimization process of pipelining, Q. Explain Optimization process...

Q. Explain Optimization process of Pipelining ? RISC machines can use a very efficient pipeline scheme due to the regular and simple instructions. Similarly all other instructi

Performance equation of computer system, Performance Equation of computer s...

Performance Equation of computer system: Following equation is frequently used for expressing a computer's performance ability: The CISC approach tries to minimize the

Scanners, A Scanner is a device which allows you to capture photographs or ...

A Scanner is a device which allows you to capture photographs or drawings or text from tangible sources (paper or slides etc.) in electronic form. Scanners work by detecting differ

Terms in propositional model, Terms in Propositional model: There in f...

Terms in Propositional model: There in first-order logic allows us to talking about properties of objects that the first job for our model (Δ, Θ) is to assign a meaning to the

Define mfc, Define MFC. To accommodate the variability in response time...

Define MFC. To accommodate the variability in response time, the processor waits unless it receives an indication that the requested read operation has been done. The control s

Explain the technique used in asymmetric key cryptography, Explain the tech...

Explain the technique used in the asymmetric Key Cryptography. Asymmetric or public-key cryptography be different from conventional cryptography in which key material is bound

Main strength of ascii, Q. Main strength of ASCII? One such standard co...

Q. Main strength of ASCII? One such standard code which enables language encoding that is popularly used is ASCII (American Standard Code for Information Interchange). This cod

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd